| (19) |
 |
|
(11) |
EP 0 179 474 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
13.07.1988 Bulletin 1988/28 |
| (43) |
Date of publication A2: |
|
30.04.1986 Bulletin 1986/18 |
| (22) |
Date of filing: 24.10.1985 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT |
| (30) |
Priority: |
24.10.1984 US 664312
15.08.1985 US 765799
|
| (71) |
Applicant: E.I. DU PONT DE NEMOURS AND COMPANY |
|
() |
|
|
| |
|
| (54) |
Gas separation membrane and process for preparing it |
(57) A gas separation membrane and its preparation is disclosed. The membrane is an aromatic
polyamide or amide-like polymer which has been treated with a dilute solution of a
cationic surfactant in a volatile non-polar organic solvent.